How to convert M4A to AU. Step 1. Upload m4a-file(s) Let the file convert and you can download your au file right afterwards. M4A to AU Quality Rating. 4.6 (113 Locate and click Edit in the menu bar, and select Preferences. On the General tab, click Import Settings. On the Import Settings window, for the Import Using option, select MP3 Encoder from the drop-down, then click OK. Now select the M4A audio file, go to File, then choose Convert, then select Create MP3 Version. 13. The standard tool to do this not just for mp3 but for lots of audio and even video formats is ffmpeg: ffmpeg -i in.opus -ss 00:00:30.0 -t 00:03:00 -c copy out.opus. Would take a 3 minute piece of in.opus starting at 30 seconds and put it into out.opus without transcoding ( -c copy ). Launch Audacity. Go to the menu bar, and click on “Audacity” > “Preferences” > “Libraries” > locate and add the FFmpeg library. Return to the main interface of Audacity. Drag-n-drop M4A audio into it. Head to “File” > “Export” > “Export as MP3”. From the pop-up “Extract Audio” window, click “Save”. Step 4 Export the Recording. After stopping the recording in Audacity, you can trim and edit the Spotify recording by using Audacity Audio Editor. To export the recordings, go to the toolbar and click on " File ." Select " Export " from the dropdown menu. Choose " Export Audio… " to open the Export Audio window. Installing Audacity on Windows. Go to the Windows Download page of the Audacity site and follow the instructions there. If you prefer not to use the installer (or security restrictions prevent installing applications), left-click the link for the "zip" file instead. Then click on the downloaded file to open it in Windows Explorer and choose the Finder and VLC are not agreeing. I bet Finder is basing it off the file extension (which is iTunes' own mp4 audio name) and VLC is basing it off the codec inside. If VLC is correct then you need to change the file extensions to mp3. No recoding, just change the extension so iTunes identifies it and plays it correctly. Convert your audio to another format. This is a list with the audio conversion tools we provide. We support the conversion from over 50 source formats. You can see the details on the converter page. Just select your target converter and start uploading your files. All audio converters can also rip the audio from a video file. In Audacity, go to the Tools menu and then Apply Macro. There is a ready-made macro called MP3 Conversion. That’s what you need. You get the option to apply the macro to either the current project or a collection of files. The files option is the batch conversion you are looking for. More details here: Tutorial - Macros section. 1. Convert M4A to MP3 with iTunes. You can convert a song in M4A format to MP3 format while keeping a copy of the original with iTunes. Step 1: Open iTunes and add the M4A file to iTunes. Click "File" and open "Add Folder to Library." Select the folder where the M4A files are saved and then click "Open" to add the M4As to iTunes. acniU.